United States. Bureau of Labor. "Wages in the United States and Europe, 1870-1898,"
in
United States. Bureau of Labor. "September 1898 : Bulletin of the United States Bureau of Labor, No. 18, Volume III,"
Bulletin of the United States Bureau of Labor, Nos. 1 - 100
(September 1898)
: 5-33.
https://fraser.stlouisfed.org/title/3943/item/477571/toc/498267
, accessed on December 19, 2018.